SkMagnifierImageFilter.cpp revision 55fad7af61c21d502acb9891d631e8aa29e3628c
182aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com/* 282aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com * Copyright 2012 The Android Open Source Project 382aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com * 482aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com * Use of this source code is governed by a BSD-style license that can be 582aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com * found in the LICENSE file. 682aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com */ 782aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 882aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com#include "SkBitmap.h" 982aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com#include "SkMagnifierImageFilter.h" 1082aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com#include "SkColorPriv.h" 118b0e8ac5f582de80356019406e2975079bf0829dcommit-bot@chromium.org#include "SkReadBuffer.h" 128b0e8ac5f582de80356019406e2975079bf0829dcommit-bot@chromium.org#include "SkWriteBuffer.h" 13c0b7e10c6a68f59e1653e6c18e6bc954b3c3f0cfcommit-bot@chromium.org#include "SkValidationUtils.h" 1482aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 1582aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com//////////////////////////////////////////////////////////////////////////////// 1603245700d6f1c5db903a2b9ea34e6cc0ce34a185bsalomon@google.com#if SK_SUPPORT_GPU 1782aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com#include "effects/GrSingleTextureEffect.h" 18d698f77c13d97c61109b861eac4d25b14a5de935bsalomon@google.com#include "gl/GrGLEffect.h" 1982aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com#include "gl/GrGLSL.h" 2082aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com#include "gl/GrGLTexture.h" 212eaaefd7e6a58339b3f93333f1e9cc92252cc303bsalomon@google.com#include "GrTBackendEffectFactory.h" 2282aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 2382aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.comclass GrGLMagnifierEffect; 2482aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 2582aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.comclass GrMagnifierEffect : public GrSingleTextureEffect { 2682aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 2782aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.compublic: 280ac6af49975c54c2debf41e9200af416ecd2d973bsalomon@google.com static GrEffectRef* Create(GrTexture* texture, 290ac6af49975c54c2debf41e9200af416ecd2d973bsalomon@google.com float xOffset, 300ac6af49975c54c2debf41e9200af416ecd2d973bsalomon@google.com float yOffset, 31f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org float xInvZoom, 32f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org float yInvZoom, 33f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org float xInvInset, 34f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org float yInvInset) { 3555fad7af61c21d502acb9891d631e8aa29e3628cbsalomon return SkNEW_ARGS(GrMagnifierEffect, (texture, 3655fad7af61c21d502acb9891d631e8aa29e3628cbsalomon xOffset, 3755fad7af61c21d502acb9891d631e8aa29e3628cbsalomon yOffset, 3855fad7af61c21d502acb9891d631e8aa29e3628cbsalomon xInvZoom, 3955fad7af61c21d502acb9891d631e8aa29e3628cbsalomon yInvZoom, 4055fad7af61c21d502acb9891d631e8aa29e3628cbsalomon xInvInset, 4155fad7af61c21d502acb9891d631e8aa29e3628cbsalomon yInvInset)); 420ac6af49975c54c2debf41e9200af416ecd2d973bsalomon@google.com } 4382aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 4482aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com virtual ~GrMagnifierEffect() {}; 4582aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 4682aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com static const char* Name() { return "Magnifier"; } 4782aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 48396e61fe440590744345e0c56970b26ab464591dbsalomon@google.com virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE; 4968b58c95384dd6c2fd389a5b4bbf8fc468819454bsalomon@google.com virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags) const SK_OVERRIDE; 5082aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 5182aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com float x_offset() const { return fXOffset; } 5282aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com float y_offset() const { return fYOffset; } 53f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org float x_inv_zoom() const { return fXInvZoom; } 54f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org float y_inv_zoom() const { return fYInvZoom; } 55f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org float x_inv_inset() const { return fXInvInset; } 56f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org float y_inv_inset() const { return fYInvInset; } 5782aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 58422e81aeb1f4078367c85efe591c7df8c33874ecbsalomon@google.com typedef GrGLMagnifierEffect GLEffect; 5982aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 6082aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.comprivate: 610ac6af49975c54c2debf41e9200af416ecd2d973bsalomon@google.com GrMagnifierEffect(GrTexture* texture, 620ac6af49975c54c2debf41e9200af416ecd2d973bsalomon@google.com float xOffset, 630ac6af49975c54c2debf41e9200af416ecd2d973bsalomon@google.com float yOffset, 64f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org float xInvZoom, 65f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org float yInvZoom, 66f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org float xInvInset, 67f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org float yInvInset) 680ac6af49975c54c2debf41e9200af416ecd2d973bsalomon@google.com : GrSingleTextureEffect(texture, MakeDivByTextureWHMatrix(texture)) 690ac6af49975c54c2debf41e9200af416ecd2d973bsalomon@google.com , fXOffset(xOffset) 700ac6af49975c54c2debf41e9200af416ecd2d973bsalomon@google.com , fYOffset(yOffset) 71f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org , fXInvZoom(xInvZoom) 72f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org , fYInvZoom(yInvZoom) 73f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org , fXInvInset(xInvInset) 74f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org , fYInvInset(yInvInset) {} 750ac6af49975c54c2debf41e9200af416ecd2d973bsalomon@google.com 768a252f79629b189a03de22cd8ff0312c5bccedd1bsalomon@google.com virtual bool onIsEqual(const GrEffect&) const SK_OVERRIDE; 7768b58c95384dd6c2fd389a5b4bbf8fc468819454bsalomon@google.com 78f271cc7183fe48ac64d2d9a454eb013c91b42d53bsalomon@google.com GR_DECLARE_EFFECT_TEST; 7982aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 8082aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com float fXOffset; 8182aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com float fYOffset; 82f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org float fXInvZoom; 83f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org float fYInvZoom; 84f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org float fXInvInset; 85f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org float fYInvInset; 8682aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 8782aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com typedef GrSingleTextureEffect INHERITED; 8882aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com}; 8982aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 9082aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com// For brevity 9182aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.comtypedef GrGLUniformManager::UniformHandle UniformHandle; 9282aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 9347d7a8885b02478fa41069f14bba7ffbe5475d87bsalomon@google.comclass GrGLMagnifierEffect : public GrGLEffect { 9482aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.compublic: 95c78188896e28a4ae49e406a7422b345ae177dafebsalomon@google.com GrGLMagnifierEffect(const GrBackendEffectFactory&, const GrDrawEffect&); 9682aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 9747d7a8885b02478fa41069f14bba7ffbe5475d87bsalomon@google.com virtual void emitCode(GrGLShaderBuilder*, 98c78188896e28a4ae49e406a7422b345ae177dafebsalomon@google.com const GrDrawEffect&, 9947d7a8885b02478fa41069f14bba7ffbe5475d87bsalomon@google.com EffectKey, 10047d7a8885b02478fa41069f14bba7ffbe5475d87bsalomon@google.com const char* outputColor, 10147d7a8885b02478fa41069f14bba7ffbe5475d87bsalomon@google.com const char* inputColor, 10277af6805e5faea1e2a5c0220098aec9082f3a6e5bsalomon@google.com const TransformedCoordsArray&, 10347d7a8885b02478fa41069f14bba7ffbe5475d87bsalomon@google.com const TextureSamplerArray&) SK_OVERRIDE; 10482aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 105c78188896e28a4ae49e406a7422b345ae177dafebsalomon@google.com virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVERRIDE; 10682aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 10782aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.comprivate: 10817fc651dbe2e0624f6c85fb6e081d28a87d5a08bbsalomon@google.com UniformHandle fOffsetVar; 109f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org UniformHandle fInvZoomVar; 110f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org UniformHandle fInvInsetVar; 11117fc651dbe2e0624f6c85fb6e081d28a87d5a08bbsalomon@google.com 11247d7a8885b02478fa41069f14bba7ffbe5475d87bsalomon@google.com typedef GrGLEffect INHERITED; 11382aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com}; 11482aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 11577af6805e5faea1e2a5c0220098aec9082f3a6e5bsalomon@google.comGrGLMagnifierEffect::GrGLMagnifierEffect(const GrBackendEffectFactory& factory, const GrDrawEffect&) 11677af6805e5faea1e2a5c0220098aec9082f3a6e5bsalomon@google.com : INHERITED(factory) { 11782aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com} 11882aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 11947d7a8885b02478fa41069f14bba7ffbe5475d87bsalomon@google.comvoid GrGLMagnifierEffect::emitCode(GrGLShaderBuilder* builder, 120c78188896e28a4ae49e406a7422b345ae177dafebsalomon@google.com const GrDrawEffect&, 12117fc651dbe2e0624f6c85fb6e081d28a87d5a08bbsalomon@google.com EffectKey key, 12247d7a8885b02478fa41069f14bba7ffbe5475d87bsalomon@google.com const char* outputColor, 12347d7a8885b02478fa41069f14bba7ffbe5475d87bsalomon@google.com const char* inputColor, 12477af6805e5faea1e2a5c0220098aec9082f3a6e5bsalomon@google.com const TransformedCoordsArray& coords, 12547d7a8885b02478fa41069f14bba7ffbe5475d87bsalomon@google.com const TextureSamplerArray& samplers) { 12677af6805e5faea1e2a5c0220098aec9082f3a6e5bsalomon@google.com SkString coords2D = builder->ensureFSCoords2D(coords, 0); 12747d7a8885b02478fa41069f14bba7ffbe5475d87bsalomon@google.com fOffsetVar = builder->addUniform( 12874a3a2135ca82ab9324b7e499caa3280348a4fdacommit-bot@chromium.org GrGLShaderBuilder::kFragment_Visibility | 12974a3a2135ca82ab9324b7e499caa3280348a4fdacommit-bot@chromium.org GrGLShaderBuilder::kVertex_Visibility, 130f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org kVec2f_GrSLType, "Offset"); 131f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org fInvZoomVar = builder->addUniform( 13274a3a2135ca82ab9324b7e499caa3280348a4fdacommit-bot@chromium.org GrGLShaderBuilder::kFragment_Visibility | 13374a3a2135ca82ab9324b7e499caa3280348a4fdacommit-bot@chromium.org GrGLShaderBuilder::kVertex_Visibility, 134f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org kVec2f_GrSLType, "InvZoom"); 135f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org fInvInsetVar = builder->addUniform( 13674a3a2135ca82ab9324b7e499caa3280348a4fdacommit-bot@chromium.org GrGLShaderBuilder::kFragment_Visibility | 13774a3a2135ca82ab9324b7e499caa3280348a4fdacommit-bot@chromium.org GrGLShaderBuilder::kVertex_Visibility, 138f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org kVec2f_GrSLType, "InvInset"); 13982aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 14077af6805e5faea1e2a5c0220098aec9082f3a6e5bsalomon@google.com builder->fsCodeAppendf("\t\tvec2 coord = %s;\n", coords2D.c_str()); 141f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org builder->fsCodeAppendf("\t\tvec2 zoom_coord = %s + %s * %s;\n", 142f910d3b23bcf590ee937628dbab8e39a98ee5860bsalomon@google.com builder->getUniformCStr(fOffsetVar), 14377af6805e5faea1e2a5c0220098aec9082f3a6e5bsalomon@google.com coords2D.c_str(), 144f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org builder->getUniformCStr(fInvZoomVar)); 145f910d3b23bcf590ee937628dbab8e39a98ee5860bsalomon@google.com 146f910d3b23bcf590ee937628dbab8e39a98ee5860bsalomon@google.com builder->fsCodeAppend("\t\tvec2 delta = min(coord, vec2(1.0, 1.0) - coord);\n"); 147f910d3b23bcf590ee937628dbab8e39a98ee5860bsalomon@google.com 148f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org builder->fsCodeAppendf("\t\tdelta = delta * %s;\n", builder->getUniformCStr(fInvInsetVar)); 149f910d3b23bcf590ee937628dbab8e39a98ee5860bsalomon@google.com 150f910d3b23bcf590ee937628dbab8e39a98ee5860bsalomon@google.com builder->fsCodeAppend("\t\tfloat weight = 0.0;\n"); 151f910d3b23bcf590ee937628dbab8e39a98ee5860bsalomon@google.com builder->fsCodeAppend("\t\tif (delta.s < 2.0 && delta.t < 2.0) {\n"); 152f910d3b23bcf590ee937628dbab8e39a98ee5860bsalomon@google.com builder->fsCodeAppend("\t\t\tdelta = vec2(2.0, 2.0) - delta;\n"); 153f910d3b23bcf590ee937628dbab8e39a98ee5860bsalomon@google.com builder->fsCodeAppend("\t\t\tfloat dist = length(delta);\n"); 154f910d3b23bcf590ee937628dbab8e39a98ee5860bsalomon@google.com builder->fsCodeAppend("\t\t\tdist = max(2.0 - dist, 0.0);\n"); 155f910d3b23bcf590ee937628dbab8e39a98ee5860bsalomon@google.com builder->fsCodeAppend("\t\t\tweight = min(dist * dist, 1.0);\n"); 156f910d3b23bcf590ee937628dbab8e39a98ee5860bsalomon@google.com builder->fsCodeAppend("\t\t} else {\n"); 157f910d3b23bcf590ee937628dbab8e39a98ee5860bsalomon@google.com builder->fsCodeAppend("\t\t\tvec2 delta_squared = delta * delta;\n"); 158f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org builder->fsCodeAppend("\t\t\tweight = min(min(delta_squared.x, delta_squared.y), 1.0);\n"); 159f910d3b23bcf590ee937628dbab8e39a98ee5860bsalomon@google.com builder->fsCodeAppend("\t\t}\n"); 160f910d3b23bcf590ee937628dbab8e39a98ee5860bsalomon@google.com 161f910d3b23bcf590ee937628dbab8e39a98ee5860bsalomon@google.com builder->fsCodeAppend("\t\tvec2 mix_coord = mix(coord, zoom_coord, weight);\n"); 162f910d3b23bcf590ee937628dbab8e39a98ee5860bsalomon@google.com builder->fsCodeAppend("\t\tvec4 output_color = "); 16374a3a2135ca82ab9324b7e499caa3280348a4fdacommit-bot@chromium.org builder->fsAppendTextureLookup(samplers[0], "mix_coord"); 164f910d3b23bcf590ee937628dbab8e39a98ee5860bsalomon@google.com builder->fsCodeAppend(";\n"); 165f910d3b23bcf590ee937628dbab8e39a98ee5860bsalomon@google.com 166f910d3b23bcf590ee937628dbab8e39a98ee5860bsalomon@google.com builder->fsCodeAppendf("\t\t%s = output_color;", outputColor); 167f910d3b23bcf590ee937628dbab8e39a98ee5860bsalomon@google.com SkString modulate; 168f910d3b23bcf590ee937628dbab8e39a98ee5860bsalomon@google.com GrGLSLMulVarBy4f(&modulate, 2, outputColor, inputColor); 169f910d3b23bcf590ee937628dbab8e39a98ee5860bsalomon@google.com builder->fsCodeAppend(modulate.c_str()); 17082aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com} 17182aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 17282aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.comvoid GrGLMagnifierEffect::setData(const GrGLUniformManager& uman, 173c78188896e28a4ae49e406a7422b345ae177dafebsalomon@google.com const GrDrawEffect& drawEffect) { 174c78188896e28a4ae49e406a7422b345ae177dafebsalomon@google.com const GrMagnifierEffect& zoom = drawEffect.castEffect<GrMagnifierEffect>(); 17582aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com uman.set2f(fOffsetVar, zoom.x_offset(), zoom.y_offset()); 176f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org uman.set2f(fInvZoomVar, zoom.x_inv_zoom(), zoom.y_inv_zoom()); 177f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org uman.set2f(fInvInsetVar, zoom.x_inv_inset(), zoom.y_inv_inset()); 17882aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com} 17982aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 18082aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com///////////////////////////////////////////////////////////////////// 18182aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 182f271cc7183fe48ac64d2d9a454eb013c91b42d53bsalomon@google.comGR_DEFINE_EFFECT_TEST(GrMagnifierEffect); 18382aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 184e0e7cfe44bb9d66d76120a79e5275c294bacaa22commit-bot@chromium.orgGrEffectRef* GrMagnifierEffect::TestCreate(SkRandom* random, 1850ac6af49975c54c2debf41e9200af416ecd2d973bsalomon@google.com GrContext* context, 186c26d94fd7dc0b00cd6d0e42d28285f4a38aff021bsalomon@google.com const GrDrawTargetCaps&, 1870ac6af49975c54c2debf41e9200af416ecd2d973bsalomon@google.com GrTexture** textures) { 1881aa68723b8ef4ce0b6db9fe51e7d8051cdd543ffsenorblanco@chromium.org GrTexture* texture = textures[0]; 18982aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com const int kMaxWidth = 200; 19082aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com const int kMaxHeight = 200; 19182aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com const int kMaxInset = 20; 1925d8d18651a64f62dbb8881794e23f53bf22c9a23robertphillips@google.com uint32_t width = random->nextULessThan(kMaxWidth); 1935d8d18651a64f62dbb8881794e23f53bf22c9a23robertphillips@google.com uint32_t height = random->nextULessThan(kMaxHeight); 1945d8d18651a64f62dbb8881794e23f53bf22c9a23robertphillips@google.com uint32_t x = random->nextULessThan(kMaxWidth - width); 1955d8d18651a64f62dbb8881794e23f53bf22c9a23robertphillips@google.com uint32_t y = random->nextULessThan(kMaxHeight - height); 1961aa68723b8ef4ce0b6db9fe51e7d8051cdd543ffsenorblanco@chromium.org uint32_t inset = random->nextULessThan(kMaxInset); 1971aa68723b8ef4ce0b6db9fe51e7d8051cdd543ffsenorblanco@chromium.org 1981aa68723b8ef4ce0b6db9fe51e7d8051cdd543ffsenorblanco@chromium.org GrEffectRef* effect = GrMagnifierEffect::Create( 1991aa68723b8ef4ce0b6db9fe51e7d8051cdd543ffsenorblanco@chromium.org texture, 2001aa68723b8ef4ce0b6db9fe51e7d8051cdd543ffsenorblanco@chromium.org (float) width / texture->width(), 2011aa68723b8ef4ce0b6db9fe51e7d8051cdd543ffsenorblanco@chromium.org (float) height / texture->height(), 2021aa68723b8ef4ce0b6db9fe51e7d8051cdd543ffsenorblanco@chromium.org texture->width() / (float) x, 2031aa68723b8ef4ce0b6db9fe51e7d8051cdd543ffsenorblanco@chromium.org texture->height() / (float) y, 2041aa68723b8ef4ce0b6db9fe51e7d8051cdd543ffsenorblanco@chromium.org (float) inset / texture->width(), 2051aa68723b8ef4ce0b6db9fe51e7d8051cdd543ffsenorblanco@chromium.org (float) inset / texture->height()); 20696ae688f03f05a53c2ae6e66a431e180b90be9cdcommit-bot@chromium.org SkASSERT(NULL != effect); 207021fc736f89fddac4f26b3f32f50263ff8fe3279bsalomon@google.com return effect; 20882aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com} 20982aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 21082aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com/////////////////////////////////////////////////////////////////////////////// 21182aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 212396e61fe440590744345e0c56970b26ab464591dbsalomon@google.comconst GrBackendEffectFactory& GrMagnifierEffect::getFactory() const { 213396e61fe440590744345e0c56970b26ab464591dbsalomon@google.com return GrTBackendEffectFactory<GrMagnifierEffect>::getInstance(); 21482aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com} 21582aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 2168a252f79629b189a03de22cd8ff0312c5bccedd1bsalomon@google.combool GrMagnifierEffect::onIsEqual(const GrEffect& sBase) const { 2176340a41108633ac1ce5941e5cd30538630c4c55bbsalomon@google.com const GrMagnifierEffect& s = CastEffect<GrMagnifierEffect>(sBase); 21868b58c95384dd6c2fd389a5b4bbf8fc468819454bsalomon@google.com return (this->texture(0) == s.texture(0) && 21968b58c95384dd6c2fd389a5b4bbf8fc468819454bsalomon@google.com this->fXOffset == s.fXOffset && 22082aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com this->fYOffset == s.fYOffset && 221f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org this->fXInvZoom == s.fXInvZoom && 222f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org this->fYInvZoom == s.fYInvZoom && 223f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org this->fXInvInset == s.fXInvInset && 224f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org this->fYInvInset == s.fYInvInset); 22582aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com} 22682aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 22768b58c95384dd6c2fd389a5b4bbf8fc468819454bsalomon@google.comvoid GrMagnifierEffect::getConstantColorComponents(GrColor* color, uint32_t* validFlags) const { 22868b58c95384dd6c2fd389a5b4bbf8fc468819454bsalomon@google.com this->updateConstantColorComponentsForModulation(color, validFlags); 22968b58c95384dd6c2fd389a5b4bbf8fc468819454bsalomon@google.com} 23068b58c95384dd6c2fd389a5b4bbf8fc468819454bsalomon@google.com 23103245700d6f1c5db903a2b9ea34e6cc0ce34a185bsalomon@google.com#endif 23203245700d6f1c5db903a2b9ea34e6cc0ce34a185bsalomon@google.com 23382aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com//////////////////////////////////////////////////////////////////////////////// 2348b0e8ac5f582de80356019406e2975079bf0829dcommit-bot@chromium.orgSkMagnifierImageFilter::SkMagnifierImageFilter(SkReadBuffer& buffer) 235ce33d60187718e7bb01944ee130c9f5d9fb335eccommit-bot@chromium.org : INHERITED(1, buffer) { 23682aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com float x = buffer.readScalar(); 23782aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com float y = buffer.readScalar(); 23882aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com float width = buffer.readScalar(); 23982aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com float height = buffer.readScalar(); 24082aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com fSrcRect = SkRect::MakeXYWH(x, y, width, height); 24182aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com fInset = buffer.readScalar(); 242c0b7e10c6a68f59e1653e6c18e6bc954b3c3f0cfcommit-bot@chromium.org 243cd3b15ca6364a04b0eeeb4f89c7daa8aefe854c8commit-bot@chromium.org buffer.validate(SkScalarIsFinite(fInset) && SkIsValidRect(fSrcRect) && 244cd3b15ca6364a04b0eeeb4f89c7daa8aefe854c8commit-bot@chromium.org // Negative numbers in src rect are not supported 245cd3b15ca6364a04b0eeeb4f89c7daa8aefe854c8commit-bot@chromium.org (fSrcRect.fLeft >= 0) && (fSrcRect.fTop >= 0)); 24682aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com} 24782aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 2489f25de79009ce721aa13abe71c38179d5a6710e2senorblanco@chromium.org// FIXME: implement single-input semantics 249cac5fd597f6e2495f50aaa6bcbe3dadc56f0b977commit-bot@chromium.orgSkMagnifierImageFilter::SkMagnifierImageFilter(const SkRect& srcRect, SkScalar inset) 2509f25de79009ce721aa13abe71c38179d5a6710e2senorblanco@chromium.org : INHERITED(0), fSrcRect(srcRect), fInset(inset) { 25182aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com SkASSERT(srcRect.x() >= 0 && srcRect.y() >= 0 && inset >= 0); 25282aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com} 25382aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 25403245700d6f1c5db903a2b9ea34e6cc0ce34a185bsalomon@google.com#if SK_SUPPORT_GPU 2557938bae14af94c1d48d122a2d686e123b66411a7senorblanco@chromium.orgbool SkMagnifierImageFilter::asNewEffect(GrEffectRef** effect, GrTexture* texture, const SkMatrix&, const SkIRect&) const { 256021fc736f89fddac4f26b3f32f50263ff8fe3279bsalomon@google.com if (effect) { 257f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org SkScalar yOffset = (texture->origin() == kTopLeft_GrSurfaceOrigin) ? fSrcRect.y() : 258f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org (texture->height() - (fSrcRect.y() + fSrcRect.height())); 259f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org SkScalar invInset = fInset > 0 ? SkScalarInvert(fInset) : SK_Scalar1; 260d043ccee3788ea4192806bd8c94484ed003fa828senorblanco@chromium.org *effect = GrMagnifierEffect::Create(texture, 261d043ccee3788ea4192806bd8c94484ed003fa828senorblanco@chromium.org fSrcRect.x() / texture->width(), 262f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org yOffset / texture->height(), 263f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org fSrcRect.width() / texture->width(), 264f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org fSrcRect.height() / texture->height(), 265f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org texture->width() * invInset, 266f642f8cf90c8fd4111094026a1a9e9fdc92be9c3commit-bot@chromium.org texture->height() * invInset); 26782aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com } 26882aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com return true; 26982aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com} 270d043ccee3788ea4192806bd8c94484ed003fa828senorblanco@chromium.org#endif 27182aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 2728b0e8ac5f582de80356019406e2975079bf0829dcommit-bot@chromium.orgvoid SkMagnifierImageFilter::flatten(SkWriteBuffer& buffer) const { 27382aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com this->INHERITED::flatten(buffer); 27482aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com buffer.writeScalar(fSrcRect.x()); 27582aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com buffer.writeScalar(fSrcRect.y()); 27682aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com buffer.writeScalar(fSrcRect.width()); 27782aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com buffer.writeScalar(fSrcRect.height()); 27882aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com buffer.writeScalar(fInset); 27982aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com} 28082aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 28182aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.combool SkMagnifierImageFilter::onFilterImage(Proxy*, const SkBitmap& src, 2824cb543d6057b692e1099e9f115155f0bf323a0c8senorblanco@chromium.org const Context&, SkBitmap* dst, 283ae761f7545d8ebf181d220169afac2056b057b8ccommit-bot@chromium.org SkIPoint* offset) const { 28428fcae2ec77eb16a79e155f8d788b20457f1c951commit-bot@chromium.org SkASSERT(src.colorType() == kN32_SkColorType); 28582aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com SkASSERT(fSrcRect.width() < src.width()); 28682aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com SkASSERT(fSrcRect.height() < src.height()); 28782aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 28828fcae2ec77eb16a79e155f8d788b20457f1c951commit-bot@chromium.org if ((src.colorType() != kN32_SkColorType) || 289cd3b15ca6364a04b0eeeb4f89c7daa8aefe854c8commit-bot@chromium.org (fSrcRect.width() >= src.width()) || 290cd3b15ca6364a04b0eeeb4f89c7daa8aefe854c8commit-bot@chromium.org (fSrcRect.height() >= src.height())) { 29182aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com return false; 29282aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com } 29382aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 29482aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com SkAutoLockPixels alp(src); 29582aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com SkASSERT(src.getPixels()); 29682aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com if (!src.getPixels() || src.width() <= 0 || src.height() <= 0) { 29782aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com return false; 29882aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com } 29982aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 300c77392ed58ec78ab19fa0e3ff99fb8110854fba2reed if (!dst->allocPixels(src.info())) { 301cd3b15ca6364a04b0eeeb4f89c7daa8aefe854c8commit-bot@chromium.org return false; 302cd3b15ca6364a04b0eeeb4f89c7daa8aefe854c8commit-bot@chromium.org } 303cd3b15ca6364a04b0eeeb4f89c7daa8aefe854c8commit-bot@chromium.org 3045d8d18651a64f62dbb8881794e23f53bf22c9a23robertphillips@google.com SkScalar inv_inset = fInset > 0 ? SkScalarInvert(fInset) : SK_Scalar1; 30582aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 3065d8d18651a64f62dbb8881794e23f53bf22c9a23robertphillips@google.com SkScalar inv_x_zoom = fSrcRect.width() / src.width(); 3075d8d18651a64f62dbb8881794e23f53bf22c9a23robertphillips@google.com SkScalar inv_y_zoom = fSrcRect.height() / src.height(); 30882aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 30982aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com SkColor* sptr = src.getAddr32(0, 0); 31082aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com SkColor* dptr = dst->getAddr32(0, 0); 31182aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com int width = src.width(), height = src.height(); 31282aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com for (int y = 0; y < height; ++y) { 31382aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com for (int x = 0; x < width; ++x) { 3145d8d18651a64f62dbb8881794e23f53bf22c9a23robertphillips@google.com SkScalar x_dist = SkMin32(x, width - x - 1) * inv_inset; 3155d8d18651a64f62dbb8881794e23f53bf22c9a23robertphillips@google.com SkScalar y_dist = SkMin32(y, height - y - 1) * inv_inset; 3165d8d18651a64f62dbb8881794e23f53bf22c9a23robertphillips@google.com SkScalar weight = 0; 3175d8d18651a64f62dbb8881794e23f53bf22c9a23robertphillips@google.com 3185d8d18651a64f62dbb8881794e23f53bf22c9a23robertphillips@google.com static const SkScalar kScalar2 = SkScalar(2); 31982aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 32082aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com // To create a smooth curve at the corners, we need to work on 32182aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com // a square twice the size of the inset. 3225d8d18651a64f62dbb8881794e23f53bf22c9a23robertphillips@google.com if (x_dist < kScalar2 && y_dist < kScalar2) { 3235d8d18651a64f62dbb8881794e23f53bf22c9a23robertphillips@google.com x_dist = kScalar2 - x_dist; 3245d8d18651a64f62dbb8881794e23f53bf22c9a23robertphillips@google.com y_dist = kScalar2 - y_dist; 3255d8d18651a64f62dbb8881794e23f53bf22c9a23robertphillips@google.com 3265d8d18651a64f62dbb8881794e23f53bf22c9a23robertphillips@google.com SkScalar dist = SkScalarSqrt(SkScalarSquare(x_dist) + 3275d8d18651a64f62dbb8881794e23f53bf22c9a23robertphillips@google.com SkScalarSquare(y_dist)); 3285d8d18651a64f62dbb8881794e23f53bf22c9a23robertphillips@google.com dist = SkMaxScalar(kScalar2 - dist, 0); 3295d8d18651a64f62dbb8881794e23f53bf22c9a23robertphillips@google.com weight = SkMinScalar(SkScalarSquare(dist), SK_Scalar1); 33082aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com } else { 3315d8d18651a64f62dbb8881794e23f53bf22c9a23robertphillips@google.com SkScalar sqDist = SkMinScalar(SkScalarSquare(x_dist), 3325d8d18651a64f62dbb8881794e23f53bf22c9a23robertphillips@google.com SkScalarSquare(y_dist)); 3335d8d18651a64f62dbb8881794e23f53bf22c9a23robertphillips@google.com weight = SkMinScalar(sqDist, SK_Scalar1); 33482aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com } 33582aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 3365d8d18651a64f62dbb8881794e23f53bf22c9a23robertphillips@google.com SkScalar x_interp = SkScalarMul(weight, (fSrcRect.x() + x * inv_x_zoom)) + 3375d8d18651a64f62dbb8881794e23f53bf22c9a23robertphillips@google.com (SK_Scalar1 - weight) * x; 3385d8d18651a64f62dbb8881794e23f53bf22c9a23robertphillips@google.com SkScalar y_interp = SkScalarMul(weight, (fSrcRect.y() + y * inv_y_zoom)) + 3395d8d18651a64f62dbb8881794e23f53bf22c9a23robertphillips@google.com (SK_Scalar1 - weight) * y; 34082aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 341cd3b15ca6364a04b0eeeb4f89c7daa8aefe854c8commit-bot@chromium.org int x_val = SkPin32(SkScalarFloorToInt(x_interp), 0, width - 1); 342cd3b15ca6364a04b0eeeb4f89c7daa8aefe854c8commit-bot@chromium.org int y_val = SkPin32(SkScalarFloorToInt(y_interp), 0, height - 1); 34382aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com 34482aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com *dptr = sptr[y_val * width + x_val]; 34582aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com dptr++; 34682aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com } 34782aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com } 34882aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com return true; 34982aa7482cbf55ce6d42c692550cadee5e23146e4bsalomon@google.com} 350